Toro you don't even seem to understand that you need to win 10 Democratic seats and all your Republican seats to break even. There are not even 10 threatened Democratic seats, most are safe Democratic seats.
Right, but you said there's this tidal wave breaking towards the GOP in two years. If you are correct, then there are few safe seats for the Democrats.
I mean, I don't know. I'm not arguing that the GOP won't win back both chambers over the next 2, 4, 6 years or whatever. What I'm arguing is that you can conclusively say there is this a massive shift moving towards the GOP. If that were the case, then we wouldn't have 60 Democrat Senators and the GOP pretty much irrelevant nationally because the trends you cited have been going on for some time, if you believe your assumptions.
Additionally, with the premise of only 10 Democratic seats going Republican, doesn't really seem much of a tidal wave, seeing that the Senate would be split.
A shift of 20 seats would be called a tidal wave.